I purchased the very expensive Solaris lights in May 2007. At first I was thrilled with them because you could program them for seasons, moonlight, etc. However,
after 14 months I am very disappointed in them. We've had to replace many of the LEDs which the company did provide free of charge but you have to do diagnostics, send them in, and then wait for the replacements.
My corals (even the soft corals) are not growing as actively as I'd like although my water parameters are very good. So I have decided to get rid of the Solaris lights. Yikes, what a costly mistake that was.
A friend lent me his spare T5 lights while I am researching the new lights I want. After just two days the corals are much improved (plumper, more colorful, etc.). Even the fish are more active.